Surface observations

Data from the National Weather Service, made available here by the UAlbany Department of Atmospheric and Environmental Sciences

The weather observed at BOSTON, MA (KBOS) at 03:54 AM EDT was:
  The skies were mostly clear.
  Temperature: 39F (  4C)  Dewpoint:  21F ( -6C)  Relative Humidity:  48%
  Winds from the WSW(250 degs) at 16 mph.
  Pressure: 1009.0 millibars.  Altimeter:29.80 inches of mercury.
  The prevailing visibility was 10 miles.